Validation of viewstate MAC failed

Hi,

this error is making me crazy:

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

I have tried the work around like enableViewState="false" viewStateEncryptionMode="Never", even i did not use the DataKeyNames property of the ListView.

I am having Asp.Net 3.5 and working in C# and getting this error in LIVE environment.

I had this issue when I used jQuery to update some areas inside a web form by AJAX (only in IE, all other Browsers worked fine). Moving the AJAX-modified areas out of the <form runat=server>-tag solved the problem. Not the best solution, but in my case it worked.

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